Oil conditioner cartridge



c. A. wlNsLow ET AL OIL CONDITIONER CARTRIDGE Filed Jan. 25, 194sINVENTUM'r CHARLES` A. W/NSLOW. LAURENCE L. MOORE. BY WILL/14M 61.NOSTR/ND.

QMSJM A TTORNEK Patented Apr. 25, 1944 l OIL CONDITIONER CARTRIDGECharles A. Winslow, Laurencey L. Moore, and William G. Nostrand,Oakland, Calif., assignors to Winslow Engineering Co., Oakland.` Calif.,

a partnership consistin Catherine B. Winslow, William G. Nostrand g ofCharles A. Winslow, Laurence L. Moore, and g Application January 25,1943, serial No. 473,416 4Claims. (01.'210-187) This invention relatesto oil purifying or oil conditioning apparatus for use, for example,with internal combustion engines, and pertains particularly to afiltering cartridge member therefor. It is in the nature of animprovement over the inventions shown and described in the copending.

applications of Charles A. Winslow and Laurence L. Moore, Serial No.258,653 and Serial No. 430,749, filed, respectively, February 27, 1939,and February 13, 1942.

The inventions of said applications have proven highly satisfactory andare in extensive use, but by reason of the scarcity of certainmaterials, due to the economic situation brought about by war demands,we have been 4confronted with certain manufacturing diiculties which thepresent invention is designed to overcome.

To that end, we have developed a cartridge for use in a suitable holder,which dispenses with the use of woven fabric and metal and employs paperor fiberboard elements. No metal parts need be used in the cartridge.Therefore, the filtered oil Vis not deleteriously affected by thecorrosive action normally produced by the con'-r tinued action of oil onmetal.

Ourinexpensive, replaceable cartridge enables highly eicient filtrationof oil, all as will more fully `appear hereinafter.

Having reference to the accompanying drawing, wherein similar charactersof reference represent corresponding parts in the several views:

Fig. 1 is a longitudinal, sectional view of one application of use ofthe cartridge,

Fig. 2 is a longitudinal, sectional View of the cartridge assembly.

Fig. 3 is a cross-sectional view,ltaken on line 3-3 of Fig. 2.

Fig. 4 is a longitudinal, sectional view of a modified form of thecartridge assembly.

Fig. 5 is a cross-sectional view, taken on line 5-5 of Fig. 4.

Fig. 6 is a fragmentary view of a perforation in the tube 3.

Fig. rI is a fragmentary view of a perforation in the tube 2 or 2'.

In our improved cartridge, we employ a central tubular core 2, of fiberor cardboard. of a length corresponding to the length of the finishedcartridge. Concentric with tube 2 is a similar and larger fiber tube orcylinder 3, separately spaced from tube 2 and of a diametercorresponding to that of the nished cartridge. In length the tube 3 isslightly shorter than tube 2 for reasons shortly to appear. Both tubes 2and 3 are pro'- vided with numerous respective perforations 4-5 Vfor thepassage ofthe oil undergoing filtration.

The ends of the outer cylinder 3 are closed by paper caps or covers`6,which are centrally per-l forated to have a snug fit over the slightlypro/- truding ends of the central tube4 2. By means of the caps 6 theconcentricity of the two tubes is maintained at all times. The spacebetween the two tubes is filled with a compacted mass ofsuitablefiltering mat'erial 1, preferably of cotton waste and woodshavings.

After the filtering material has been inserted and the caps 6 placed inposition, fiber washers 8 are-pressed over the exposed ends of tube 2and down tight against the caps 6 to provide reinforcement at thesepoints. A tapered, hollow plug 9, preferably made of wood, with aperiph-,

eral flange I0, is then forced in at each end of tube 2 to expand theends of the tube 2 with the flange I0 resting clamp-fashion against arespective washer. The wooden plugs have such a friction fit with theinner tube that when they are pressed inwardly they holdthe assembledparts firmly together. The cartridge is then ready for use.

It isiunderstood that the tubes 2 and 3, although of pulp fiber, havesuflicient inherent rigidity that they will maintain their shape andposition at all times under working conditions.

The mode of use is illustrated in Fig. 1, in which II represents acontainer or holder similar to that described in the formerapplications' aforesaid. The container II is inthe form of a cylindricalshell to receive our improved cartridge. The shell has a central pipeI2, provided with perforations I3, which forms an outlet for the oilafter filtration.

The pipe is surrounded at one end by a coil spring I4, or other spacermeans, on which-rests a washer I4, which latter, in turn, supports thecartridge which is slipped over the pipe I2 and is spaced therefrom bythe thickness of the portions of the plugs 3 which telescope the papertube 2 of the cartridge.

A removable cover I5 fits over the container and is held in place bysuitable means, as a screw threaded stud I6, tting into thecorresponding end of the pipev I2. The dirty oil to be filtered entersthe container at I1 and passes up around the outside of the cartridge,whence it percolates through the perforations 5 in the outer shell ortube 3 of the cartridge and through the filtering material, escapingthrough perforations 4 in tube 2 and thence through perforations I3 intothe outlet pipe I2, cleaned and reconditioned and ready for re-use. v

Figs. 4 and 5 illustrate a simplied construction of our cartridge,wherein the cartridge construction is similar in principle to theembodiment previously described. but diers structurally in the designand assembly of tubular core 2' and cap members 6'. In the modificationabove referred to the caps '6' are provided with centrally disposed,inwardly turned anges or hub portions Il which are coaxial with tube '2'in order to fit snugly and concentrically within the ends of tube 2.Caps i also have peripheral flanges i* which telescope with outer tubeI' when the parts are in operative DOsition. In short,.the caps 6' haveeach a pair of annular anges I8 and i which, respectively.have a snugsliding t with tubes 2'` and 3'. It is noted that tube 2 is preferablyof slightly less length than tube 3 so that the caps may 'be fittedtightly against the ends of tube I and the filtering material. The hubportion I8 is preferably formed integrally with a cap and performs thefunction of a plug member I of Fig. 2 to hold the assembled partstogether.

In Fig. 4 we have shown washers I9 positioned frictionally andconcentrically with the hub portions I8 of caps 6 and disposed betweenthe caps and the ends of tube 3. It is obvious, of course, that .thewashers may be dispensed with and a direct connection between caps andthe end portions of tube 3 can be effected. Preferably, but notnecessarily, the ends of tube 2 are expanded outwardly slightly in orderto insure an easy t of the hub portions' I8 into the ends of tube 2'.

The mode of use of the cartridge is substantially the same asillustrated in Fig. 2.

The perforations provided in the tubes'2, 2' .and

3 are preferably punchedl toward the compacted mass of ltering medium.In this manner burrs 20 (Figs. 6 and 7) are formed and tend to hold thesaid ltering medium away from the perforations and thereby preventpieces of the ltering medium from passing through the said perforationsinto the oil ow.

The expressions cardboardf ber-board and pulp ber are intended to coverany suitable rigid fibrous paper product for the purpose indicated.

While the invention has been illustrated and described in certain detailof embodiment for illustrative purposes, it is not intended that theinvention be limited thereto but that modifications and changes lndetails of construction may be incorporated within the spirit and scopeof the appanded claims.

We claim:

1. An oil conditioner element comprising a cen' trally disposed,perforated, rigid, pulp ber, tubular core, a concentrically disposedoutside perforated cylindrical casing of pulp ber, a compacted fillingof filtering material ln the space between the core and casing. a papercap closing over each end of the tube 'and casing to complete theenclosure of the filtering material, the caps having central openingscoaxial with and of substantially equal diameter as the central tube,and a hollow plug tting each end of the tubular casing and acting toexpand the core and at the same time exert pressure endwise against thecaps to clamp the parts together as a. unitary strucure.

2. An oil conditioner element comprising two concentrically arranged,spaced, pulp fiber tubes, each of which is perforated and ofsubstantially equal length, a filtering material in the space betweenthe tubes, pulp ber caps fitting over the ends of the tubes to enclosethe space containing the filtering material, the caps having centralopenings fitting over the inner tube and serving to center the tubes, awasher surrounding each` projecting end. of the inner tube and restingagainst the caps, and perforated non-metallic plugs frictionally ttingthe ends of the inner tube and each plug having a peripheral flange toengage the adjacent washer, the plugs operative to clamp the partstogether as a unit. l

3. An oil conditioner element comprising a centrally disposed,perforated pulp ber tube, a perforated pulp ber' casing tubeconcentrically spaced from said central tube, a compacted mass offiltering material in the space' between the said tubes, pulp ber capsfitted over the ends ofV said tubes and frictionally engaged with theend portions of said casing tube, said caps provided with centrallydisposed bores in coaxial alignment with said central tube. andcentrally perforated means frictionally fitting within the end portionsof said central tube and adapted to hold the parts together and allowcommunication between said bores of said cap members and the saidcentral tube.

,4. An oil conditioner element comprising a centrally disposed,perforated, tubular core, an outer,

perforated tube concentric with and spaced from the tubular core and ofapproximately the same length therewith, caps tting over and spanningadjacent ends of the core and outer tube, each cap having two concentricflanges, one of which anges engages frictionally and telescopically theouter tube and the otherange engaging frictionally and telescopicallythe inside of the core, and a ltering medium in the annular spaceenclosed between the core and outer tube and caps.

CHARLES A. WINSLOW, LAURENCE L. MOORE.

WILLIAM G. NOSTRAND.

